EP1526589A2 - Electro luminescence display device - Google Patents
Electro luminescence display device Download PDFInfo
- Publication number
- EP1526589A2 EP1526589A2 EP04024957A EP04024957A EP1526589A2 EP 1526589 A2 EP1526589 A2 EP 1526589A2 EP 04024957 A EP04024957 A EP 04024957A EP 04024957 A EP04024957 A EP 04024957A EP 1526589 A2 EP1526589 A2 EP 1526589A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- emitting layer
- light
- packaging plate
- transparent substrate
- organic light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005401 electroluminescence Methods 0.000 title claims abstract description 61
- 238000004806 packaging method and process Methods 0.000 claims abstract description 117
- 239000000758 substrate Substances 0.000 claims abstract description 90
- 239000000565 sealant Substances 0.000 claims abstract description 60
- 230000006866 deterioration Effects 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 19
- 239000007924 injection Substances 0.000 description 19
- 230000005525 hole transport Effects 0.000 description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/874—Passivation; Containers; Encapsulations including getter material or desiccant
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
- H05B33/04—Sealing arrangements, e.g. against humidity
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/842—Containers
- H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/871—Self-supporting sealing arrangements
- H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants
Definitions
- the present invention relates to an electro luminescence display device, and more particularly to an electro luminescence display device that is adaptive for preventing the deterioration of an organic light-emitting layer by ultraviolet ray in a sealing process.
- Such flat panel display devices include a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP) and an electro-luminescence (EL) display, etc.
- LCD liquid crystal display
- FED field emission display
- PDP plasma display panel
- EL electro-luminescence
- the EL display in such display devices is a self-luminous device that makes a phosphorous material to emit light by a re-combination of electrons and holes.
- the EL display device is generally classified into an inorganic EL device using an inorganic compound as the phosphorous material and an organic EL using an organic compound as the phosphorus material.
- Such an EL display device has many advantages of a low voltage driving, a self-luminescence, a thin-thickness, a wide viewing angle, a fast response speed, a high contrast and so on such that it has been highlighted as a post-generation display device.
- the organic EL device is comprised of an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer.
- an organic EL device when a predetermined voltage is applied between an anode and a cathode, electrons generated from the cathode move to the light-emitting layer through the electron injection layer and the electron transport layer, while holes generated from the anode move to the light-emitting layer through the hole injection layer and the hole transport layer. Accordingly, the electrons and the holes fed from the electron transport layer and the hole transport layer are re-combined to emit light.
- an EL display device of prior art includes a transparent substrate 2, an organic light-emitting layer 18 formed on the transparent substrate 2, a packaging plate 24 to seal off the organic light-emitting layer 18 on the transparent substrate 2, and a sealant 22 to bond the packaging plate 24 with the transparent substrate 2.
- the organic light-emitting layer 18 includes an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown).
- the organic light-emitting layer 18 if voltage is applied between a transparent electrode as the anode and a metal electrode as the cathode, the electrons generated from the cathode move to the light-emitting layer through the electron injection layer and the electron transport layer, and the holes generated from the anode move to the light emitting layer through the hole injection layer and the hole transport layer.
- the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light.
- the light is emitted to the outside through the anode, the transparent electrode, to display a picture.
- the packaging plate 24 absorbs moisture and oxygen in the air, so a hygroscopic film 27 is stuck to the packaging plate 24 in order to protect the organic light-emitting layer 18 from the moisture and oxygen in the air.
- the packaging plate 24 includes a stepped part 30 having an incline plane 26 and a horizontal plane.
- the stepped part 30 provides an inner space, where the hygroscopic film 27 is stuck, in the central part of the packaging plate 24.
- the sealant 22 is spread between the transparent substrate 2 and the most outer stepped plane 28 of the packaging plate 24, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding the packaging plate 24 with the transparent substrate 2. Due to this, the packaging plate 24 seals up the organic light-emitting layer 18 by being bonded with the transparent substrate 2 by the sealant 22 in a vacuum state.
- the electro luminescence display device of prior art bonds the transparent substrate 2 with the packaging plate 24 by a bonding device.
- the bonding device includes a large transparent substrate 2 where a plurality of organic light-emitting layers 18 are formed and which is fixed by a fixing means (not shown) ; a plurality of absorbers 50 to which a plurality of packaging plates 24 are absorbed, wherein the packaging plates 24 are bonded with the organic light-emitting layer 18; a sealant 22 spread at the edge of the transparent substrate 2 or the packaging plate 24; an UV illuminating device 60 to illuminate an ultraviolet ray 62 to the sealant 24; and a mask 64 to mask other area than the sealant 24 in order that the ultraviolet ray 62 is not illuminated onto each organic light-emitting layer 18.
- the absorbers 50 absorbs the packaging plate 24 supplied from the outside, using a pad 52.
- the absorber 50 has the packaging plate 24 absorbed on the pad 52 thereof and has the transparent substrate fixed thereto by a fixing means to align the organic light-emitting layer 18 formed on the transparent substrate 2 and the packaging plate 24.
- the ultraviolet ray 62 from the UV illuminating device 60 is illuminated onto the sealant 22 spread between the transparent substrate 2 and the packaging plate 24 for a designated time.
- the mask 64 allow the ultraviolet ray 62 illuminated from the UV illuminating device 60 to be illuminated only on the sealant 22 spread between the transparent substrate 2 and the packaging plate 24, and the ultraviolet ray 62 is intercepted at the remaining area.
- the sealant 22 is hardened by the ultraviolet ray 62 illuminated through the mask 64 to bond the transparent substrate 2 with the packaging plate 24.
- the ultraviolet ray 64 illuminated onto the sealant 22 through the mask 64 is dispersed by the incline plane 26 of the stepped plane 30 formed at the packaging plate 24 to generate a borrowed light 70. That is, the ultraviolet ray 64 is illuminated onto the sealant 22 to harden the sealant 22, and at the same time, is dispersed by the incline plane 26 of the stepped part 30 formed at the packaging plate 24 to generate the borrowed light 70.
- the borrowed light 70 repeats to be reflected over and over between the transparent substrate 2 and the incline plane 26 and the stepped plane 26 of the stepped part 30 formed at the packaging plate 24 to be illuminated onto the surrounding area of the organic light-emitting layer 18 and the EL display device. Accordingly, the borrowed light 70 is illuminated on to the organic light-emitting layer 18 to deteriorate the organic light-emitting layer 18, and in addition, is illuminated onto the surrounding area of the EL display device to change the characteristic of the driving devices inclusive of the transistor of the surrounding circuit of the EL display device.
- the EL display device of prior art has the edge of the organic light-emitting layer 18 deteriorated by the borrowed light 70 which are caused by the dispersion of ultraviolet ray 64 illuminated onto the sealant 22 upon the bonding process of the transparent substrate 2 and the packaging plate 24, and in addition, it has the characteristic of the driving devices of the surrounding circuit changed, thereby causing a brightness difference between the central part 80 of the EL display device and the other area 82, as shown in FIG. 4.
- an object of the present invention to provide an electro luminescence display device that is adaptive for preventing the deterioration of an organic light-emitting layer by ultraviolet ray in a sealing process.
- an electro luminescence display device includes a transparent substrate; an organic light-emitting layer formed on the transparent substrate; a packaging plate bonded with the transparent substrate by a sealant to cover the organic light-emitting layer; and a light-intercepting member to shut off that the ultraviolet ray illuminated onto the sealant upon bonding the transparent substrate with the packaging plate is reflected by the packaging plate to be illuminated onto the organic light-emitting layer.
- the light-intercepting member is a light-intercepting projected part which is projected toward the transparent substrate from the packaging plate.
- Thelight-intercepting projected partislocated between the sealant and the organic light-emitting layer is the light-intercepting projected partislocated between the sealant and the organic light-emitting layer.
- the light-intercepting projected part is projected from the packaging plate to be close to the organic light-emitting layer to the utmost.
- the electro luminescence display device wherein the light-intercepting projected part is formed to have a section of any one shape between a quadrangle and a triangle.
- the light-intercepting member is a plurality of light-intercepting projected parts that are projected toward the packaging plate from the transparent substrate.
- the light-intercepting projected parts are formed between the organic light-emitting layer and the end of the transparent substrate.
- Each of the light-intercepting projected parts is formed to have a section of any one shape between a quadrangle and a triangle.
- the light-intercepting member is an ultraviolet absorbing layer that is formed on the packaging plate to be opposite the transparent substrate and absorbs the ultraviolet ray.
- the ultraviolet absorbing layer is formed at the edge of the packaging plate so as to be opposite between the end of the transparent substrate and the edge of the organic light-emitting layer, and in addition, to overlap the edge of the organic light-emitting layer.
- FIG. 1 is a sectional diagram representing a general electro luminescence display device
- FIG. 2 is a sectional diagram representing a bonding process to bond a transparent substrate with a packaging plate, wherein the transparent substrate and the packaging plate are shown in FIG. 1;
- FIG. 3 is a sectional diagram of enlarged part A shown in FIG. 2;
- FIG. 4 is a view representing a brightness difference due to the deterioration of an organic light-emitting layer caused by an ultraviolet ray reflected by a packaging plate;
- FIG. 5 is a sectional diagram representing an electro luminescence display device according to a first embodiment of the present invention.
- FIG. 6 is a sectional diagram of enlarged part B shown in FIG. 5;
- FIG. 7 is a sectional diagram representing an electro luminescence display device according to a second embodiment of the present invention.
- FIG. 8 is a sectional diagram of enlarged part C shown in FIG. 7;
- FIG. 9 is a sectional diagram representing an electro luminescence display device according to a third embodiment of the present invention.
- FIG. 10 is a sectional diagram of enlarged part D shown in FIG. 9.
- an electro luminescence display device includes a transparent substrate 102; an organic light-emitting layer 118 formed on the transparent substrate 102; a packaging plate 124 to seal off the organic light-emitting layer 118 on the transparent substrate 102; a sealant 122 to bond the packaging plate 124 with the transparent substrate 102; and at least one light-intercepting projected part formed at the packaging plate 124 to prevent an ultraviolet ray illuminated onto the sealant 122 upon bonding the packaging plate 124 with the transparent substrate 102, from being illuminated onto the light-emitting layer 118.
- the organic light-emitting layer 118 includes an electron inj ection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown).
- the organic light-emitting layer 118 if voltage is applied between a transparent electrode as the anode and a metal electrode as the cathode, the electrons generated from the cathode move to the light-emitting layer through the electron inj ection layer and the electron transport layer, and the holes generated from the anode move to the light emitting layer through the hole inj ection layer and the hole transport layer.
- the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light.
- the light is emitted to the outside through the anode, the transparent electrode, to display a picture.
- the packaging plate 124 is bonded with the transparent substrate 102 by the sealant 122 to cover the organic light-emitting layer 118.
- the packaging plate 124 absorbs moisture and oxygen in the air, so a hygroscopic film 127 is stuck to the packaging plate 124 in order to protect the organic light-emitting layer 118 from the moisture and oxygen in the air.
- the packaging plate 124 includes a stepped part 130 having an incline plane 126 and a horizontal plane 128.
- the stepped part 130 provides an inner space, where the hygroscopic film 127 is stuck, in the central part of the packaging plate 124.
- the sealant 122 is spread between the transparent substrate 102 and the most outer stepped plane 128 of the packaging plate 124, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding the packaging plate 124 with the transparent substrate 102. Due to this, the packaging plate 124 seals up the organic light-emitting layer 118 by being bonded with the transparent substrate 102 by the sealant 122 in a vacuum state.
- the at least one light-intercepting projected part 140 is projected toward the transparent substrate 102 to have a section of any one shape of a quadrangle and a triangle on the packaging plate 124 corresponding to and between the sealant 122 and the organic light-emitting layer 118. At this moment, the light-intercepting projected part 140 is projected to be close to the organic light-emitting layer 118 to the utmost, and in addition, to have a designated gap with the transparent substrate 102.
- the light-intercepting projected part 140 shut off that the ultraviolet ray illuminated onto the sealant 122 upon the bonding process of the transparent substrate 102 and the packaging plate 124 is dispersed by the incline plane 126 of the packaging plate 124 to deteriorate the organic light-emitting layer 118 and is illuminated onto the driving devices of the surrounding area of the EL display device.
- the electro luminescence display device illuminates the ultraviolet ray onto the sealant 122 spread at the edge of any one of the packaging plate 124, which protects the organic light-emitting layer 118 from the oxygen and moisture in the air, and the transparent substrate 102, where the organic light-emitting layer 118 is formed, to harden the sealant 122, thereby bonding the transparent 102 with the packaging plate 124.
- the light-intercepting projected part 140 as shown in FIG.
- the electro luminescence display device can prevent the deterioration of the organic light-emitting layer 118 and the characteristic change of the driving devices of the surrounding part of the EL display device caused by the borrowed light 170 that is generated by the packaging plate 124 upon the hardening of the sealant 122.
- an electro luminescence display device includes a transparent substrate 202; an organic light-emitting layer 218 formed on the transparent substrate 202; a packaging plate 224 to seal off the organic light-emitting layer 218 on the transparent substrate 202; a sealant 222 to bond the packaging plate 224 with the transparent substrate 202; and a plurality of light-intercepting projected part 240 projected toward the packaging plate 224 from the transparent substrate 202 to prevent a borrowed light caused by the dispersion of an ultraviolet ray illuminated onto the sealant 222 upon bonding the packaging plate 224 with the transparent substrate 202, from being illuminated onto the light-emitting layer 218.
- the organic light-emitting layer 218 includes an electron injectionlayer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown).
- the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light.
- the light is emitted to the outside through the anode, the transparent electrode, to display a picture.
- the packaging plate 224 is bonded with the transparent substrate 202 by the sealant 222 to cover the organic light-emitting layer 218.
- the packaging plate 224 absorbs moisture and oxygen in the air, so a hygroscopic film 227 is stuck to the packaging plate 224 in order to protect the organic light-emitting layer 218 from the moisture and oxygen in the air.
- the packaging plate 224 includes a stepped part 230 having an incline plane 226 and a horizontal plane 228.
- the stepped part 230 provides an inner space, where the hygroscopic film 227 is stuck, in the central part of the packaging plate 224.
- the sealant 222 is spread between the transparent substrate 202 and the most outer stepped plane 228 of the packaging plate 224, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding the packaging plate 224 with the transparent substrate 202.
- the packaging plate 224 seals up the organic light-emitting layer 218 by being bonded with the transparent substrate 202 by the sealant 222 in a vacuum state.
- the light-intercepting projected parts 240 are projected toward a transparent substrate 202 to have a section of any one shape of a quadrangle and a triangle at the edge of the transparent substrate 202.
- the light-intercepting projected part 240 is formed between the organic light-emitting layer 218 and the end of the transparent substrate 202, and the sealant 222 is spread on part of the light-intercepting projected part 240.
- the light-intercepting projected parts 240 shut off that the ultraviolet ray illuminated onto the sealant 222 upon the bonding process of the transparent substrate 202 and the packaging plate 224 is dispersed by the incline plane 226 of the packaging plate 224 to deteriorate the organic light-emitting layer 218 and is illuminated onto the driving devices of the surrounding area of the EL display device.
- the electro luminescence display device illuminates the ultraviolet ray onto the sealant 222 spread at the edge of any one of the packaging plate 224, which protects the organic light-emitting layer 218 from the oxygen and moisture in the air, and the transparent substrate 202, where the organic light-emitting layer 218 is formed, to harden the sealant 222, thereby bonding the transparent 202 with the packaging plate 224.
- the light-intercepting projected parts 240 as shown in FIG.
- the light-intercepting projected part 240 is projected on the transparent substrate 202 to be close to the packaging plate to the utmost in order to shut off that the borrowed light 270 progresses to the organic light-emitting layer 218 by the packaging plate 224.
- the electro luminescence display device can prevent the deterioration of the organic light-emitting layer 218 and the characteristic change of the driving devices of the surrounding part of the EL display device caused by the borrowed light 270 that is generated by the packaging plate 224 upon the hardening of the sealant 222.
- an electro luminescence display device includes a transparent substrate 302; an organic light-emitting layer 318 formed on the transparent substrate 302; a packaging plate 324 to seal off the organic light-emitting layer 318 on the transparent substrate 302; a sealant 322 to bond the packaging plate 324 with the transparent substrate 302; and an ultraviolet ray absorbing layer 340 formed at the packaging plate 324 to prevent an ultraviolet ray illuminated onto the sealant 322 upon bonding the packaging plate 324 with the transparent substrate 302, from being illuminated onto the light-emitting layer 318.
- the organic light-emitting layer 318 includes an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown).
- the organic light-emitting layer 318 if voltage is applied between a transparent electrode as the anode and a metal electrode as the cathode, the electrons generated from the cathode move to the light-emitting layer through the electron inj ection layer and the electron transport layer, and the holes generated from the anode move to the light emitting layer through the hole injection layer and the hole transport layer.
- the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light.
- the light is emitted to the outside through the anode, the transparent electrode, to display a picture.
- the packaging plate 324 is bonded with the transparent substrate 302 by the sealant 322 to cover the organic light-emitting layer 318.
- the packaging plate 324 absorbs moisture and oxygen in the air, so a hygroscopic film 327 is stuck to the packaging plate 324 in order to protect the organic light-emitting layer 318 from the moisture and oxygen in the air.
- the packaging plate 324 includes a stepped part 330 having an incline plane 326 and a horizontal plane 328.
- the stepped part 330 provides an inner space, where the hygroscopic film 327 is stuck, in the central part of the packaging plate 324.
- the sealant 322 is spread between the transparent substrate 302 and the most outer stepped plane 328 of the packaging plate 324, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding the packaging plate 324 with the transparent substrate 302.
- the packaging plate 324 seals up the organic light-emitting layer 318 by being bonded with the transparent substrate 302 by the sealant 322 in a vacuum state.
- the ultraviolet absorbing layer 340 is formed at the horizontal plane 328 ad the incline plane 326 of the edge of the packaging plate 324 that are corresponding to the edge of the transparent substrate 302.
- the ultraviolet absorbing layer 340 is formed at the rear surface of the packaging plate 324 to be opposite between the end of the transparent substrate 302 and the end of the organic light-emitting layer 318. At this moment, the ultraviolet absorbing layer 340 is formed to overlap the edge area of the organic light-emitting layer 318.
- the ultraviolet absorbing layer 340 shut off that the ultraviolet ray illuminated onto the sealant 322 upon the bonding process of the transparent substrate 302 and the packaging plate 324 is dispersed by the incline plane 326 of the packaging plate 324 to deteriorate the organic light-emitting layer 318 and is illuminated onto the driving devices of the surrounding area of the EL display device.
- the electro luminescence display device illuminates the ultraviolet ray onto the sealant 322 spread at the edge of any one of the packaging plate 324, which protects the organic light-emitting layer 318 from the oxygen and moisture in the air, and the transparent substrate 302, where the organic light-emitting layer 318 is formed, to harden the sealant 322, thereby bonding the transparent 302 with the packaging plate 324.
- the ultraviolet absorbing layer 340 as shown in FIG. 10, when the ultraviolet ray 362 is illuminated onto the sealant 322, absorbs the ultraviolet ray 362 that is reflected toward the organic light-emitting layer 318 by the incline plane 326 and the horizontal plane 328 of the packaging plate 324.
- the ultraviolet absorbing layer 340 reduces the reflection efficiency of the illuminated ultraviolet ray 362 to shut off that the borrowed light 370 generated by being dispersed by the incline plane 326 and the horizontal plane 328 of the packaging plate 324 is reflected toward the organic light-emitting layer 318. Accordingly, the electro luminescence display device according to the third embodiment of the present invention can prevent the deterioration of the organic light-emitting layer 318 and the characteristic change of the driving devices of the surrounding part of the EL display device caused by the borrowed light 370 that is generated by the packaging plate 324 upon the hardening of the sealant 322.
- the electro luminescence display device includes the light-intercepting projected part which is projected toward the transparent substrate from the edge of the packaging plate. Accordingly, the present invention intercepts the ultraviolet ray which is illustrated onto the sealant upon bonding the transparent substrate with the packaging plate and reflected by the packaging plate to be illustrated onto the organic light-emitting layer, thereby preventing the deterioration of the organic light-emitting layer and the characteristic change of the driving devices of the surrounding part of the EL display device.
- the electro luminescence display device includes a plurality of light-intercepting projected parts which are proj ected toward the packaging plate from the edge of the transparent substrate. Accordingly, the present invention shuts off the ultraviolet ray, which is illuminated onto the sealant upon bonding the transparent substrate with the packaging plate and reflected by the packaging plate to be illuminated onto the organic light-emitting layer, by use of the plurality of light-intercepting proj ected parts, thereby preventing the deterioration of the organic light-emitting layer and the characteristic change of the driving devices of the surrounding area of the EL display device.
- the electro luminescence display device includes the ultraviolet absorbing layer that is formed at the edge of the packaging plate. Accordingly, the present invention absorbs the ultraviolet ray, which is illuminated onto the sealant upon bonding the transparent substrate with the packaging plate and reflected by the packaging plate to be illuminated onto the organic light-emitting layer, by use of the ultraviolet absorbing layer, thereby preventing the deterioration of the organic light-emitting layer and the characteristic change of the driving devices of the surrounding area of the EL display device.
Abstract
Description
- This application claims the benefit of Korean Patent Application No. P2003-73310 filed in Korea on October 21, 2003, which is hereby incorporated by reference.
- The present invention relates to an electro luminescence display device, and more particularly to an electro luminescence display device that is adaptive for preventing the deterioration of an organic light-emitting layer by ultraviolet ray in a sealing process.
- Recently, there have been highlighted various flat panel display devices that are capable of reducing their weight and bulk which are disadvantages of a cathode ray tube (CRT). Such flat panel display devices include a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP) and an electro-luminescence (EL) display, etc.
- The EL display in such display devices is a self-luminous device that makes a phosphorous material to emit light by a re-combination of electrons and holes. The EL display device is generally classified into an inorganic EL device using an inorganic compound as the phosphorous material and an organic EL using an organic compound as the phosphorus material. Such an EL display device has many advantages of a low voltage driving, a self-luminescence, a thin-thickness, a wide viewing angle, a fast response speed, a high contrast and so on such that it has been highlighted as a post-generation display device.
- The organic EL device is comprised of an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer. In such an organic EL device, when a predetermined voltage is applied between an anode and a cathode, electrons generated from the cathode move to the light-emitting layer through the electron injection layer and the electron transport layer, while holes generated from the anode move to the light-emitting layer through the hole injection layer and the hole transport layer. Accordingly, the electrons and the holes fed from the electron transport layer and the hole transport layer are re-combined to emit light.
- Referring to Fig. 1, an EL display device of prior art includes a
transparent substrate 2, an organic light-emitting layer 18 formed on thetransparent substrate 2, apackaging plate 24 to seal off the organic light-emitting layer 18 on thetransparent substrate 2, and asealant 22 to bond thepackaging plate 24 with thetransparent substrate 2. - The organic light-
emitting layer 18 includes an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown). In the organic light-emitting layer 18, if voltage is applied between a transparent electrode as the anode and a metal electrode as the cathode, the electrons generated from the cathode move to the light-emitting layer through the electron injection layer and the electron transport layer, and the holes generated from the anode move to the light emitting layer through the hole injection layer and the hole transport layer. Accordingly, in the light-emitting layer, the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light. The light is emitted to the outside through the anode, the transparent electrode, to display a picture. - The
packaging plate 24 absorbs moisture and oxygen in the air, so ahygroscopic film 27 is stuck to thepackaging plate 24 in order to protect the organic light-emittinglayer 18 from the moisture and oxygen in the air. For this, thepackaging plate 24 includes astepped part 30 having anincline plane 26 and a horizontal plane. Thestepped part 30 provides an inner space, where thehygroscopic film 27 is stuck, in the central part of thepackaging plate 24. - The
sealant 22 is spread between thetransparent substrate 2 and the most outerstepped plane 28 of thepackaging plate 24, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding thepackaging plate 24 with thetransparent substrate 2. Due to this, thepackaging plate 24 seals up the organic light-emittinglayer 18 by being bonded with thetransparent substrate 2 by thesealant 22 in a vacuum state. - The electro luminescence display device of prior art, as shown in FIG. 2, bonds the
transparent substrate 2 with thepackaging plate 24 by a bonding device. - More specifically, the bonding device includes a large
transparent substrate 2 where a plurality of organic light-emittinglayers 18 are formed and which is fixed by a fixing means (not shown) ; a plurality ofabsorbers 50 to which a plurality ofpackaging plates 24 are absorbed, wherein thepackaging plates 24 are bonded with the organic light-emittinglayer 18; asealant 22 spread at the edge of thetransparent substrate 2 or thepackaging plate 24; an UVilluminating device 60 to illuminate anultraviolet ray 62 to thesealant 24; and amask 64 to mask other area than thesealant 24 in order that theultraviolet ray 62 is not illuminated onto each organic light-emittinglayer 18. - The
absorbers 50 absorbs thepackaging plate 24 supplied from the outside, using apad 52. - The
absorber 50 has thepackaging plate 24 absorbed on thepad 52 thereof and has the transparent substrate fixed thereto by a fixing means to align the organic light-emittinglayer 18 formed on thetransparent substrate 2 and thepackaging plate 24. - And then, the
ultraviolet ray 62 from the UVilluminating device 60 is illuminated onto thesealant 22 spread between thetransparent substrate 2 and thepackaging plate 24 for a designated time. At this moment, themask 64 allow theultraviolet ray 62 illuminated from the UVilluminating device 60 to be illuminated only on thesealant 22 spread between thetransparent substrate 2 and thepackaging plate 24, and theultraviolet ray 62 is intercepted at the remaining area. - Accordingly, the
sealant 22 is hardened by theultraviolet ray 62 illuminated through themask 64 to bond thetransparent substrate 2 with thepackaging plate 24. - In this way, in case of bonding the
transparent substrate 2 with thepackaging plate 24 by illuminating theultraviolet ray 64 onto thesealant 22, theultraviolet ray 64 illuminated onto thesealant 22 through themask 64, as shown in FIG. 3, is dispersed by theincline plane 26 of thestepped plane 30 formed at thepackaging plate 24 to generate a borrowedlight 70. That is, theultraviolet ray 64 is illuminated onto thesealant 22 to harden thesealant 22, and at the same time, is dispersed by theincline plane 26 of thestepped part 30 formed at thepackaging plate 24 to generate the borrowedlight 70. The borrowedlight 70 repeats to be reflected over and over between thetransparent substrate 2 and theincline plane 26 and thestepped plane 26 of thestepped part 30 formed at thepackaging plate 24 to be illuminated onto the surrounding area of the organic light-emittinglayer 18 and the EL display device. Accordingly, the borrowedlight 70 is illuminated on to the organic light-emittinglayer 18 to deteriorate the organic light-emitting layer 18, and in addition, is illuminated onto the surrounding area of the EL display device to change the characteristic of the driving devices inclusive of the transistor of the surrounding circuit of the EL display device. - Accordingly, the EL display device of prior art has the edge of the organic light-emitting
layer 18 deteriorated by the borrowedlight 70 which are caused by the dispersion ofultraviolet ray 64 illuminated onto thesealant 22 upon the bonding process of thetransparent substrate 2 and thepackaging plate 24, and in addition, it has the characteristic of the driving devices of the surrounding circuit changed, thereby causing a brightness difference between thecentral part 80 of the EL display device and theother area 82, as shown in FIG. 4. - Accordingly, it is an object of the present invention to provide an electro luminescence display device that is adaptive for preventing the deterioration of an organic light-emitting layer by ultraviolet ray in a sealing process.
- In order to achieve these and other objects of the invention, an electro luminescence display device according to an aspect of the present invention includes a transparent substrate; an organic light-emitting layer formed on the transparent substrate; a packaging plate bonded with the transparent substrate by a sealant to cover the organic light-emitting layer; and a light-intercepting member to shut off that the ultraviolet ray illuminated onto the sealant upon bonding the transparent substrate with the packaging plate is reflected by the packaging plate to be illuminated onto the organic light-emitting layer.
- The light-intercepting member is a light-intercepting projected part which is projected toward the transparent substrate from the packaging plate.
- Thelight-intercepting projected partislocated between the sealant and the organic light-emitting layer.
- The light-intercepting projected part is projected from the packaging plate to be close to the organic light-emitting layer to the utmost.
- The electro luminescence display device according to
claim 2, wherein the light-intercepting projected part is formed to have a section of any one shape between a quadrangle and a triangle. - The light-intercepting member is a plurality of light-intercepting projected parts that are projected toward the packaging plate from the transparent substrate.
- The light-intercepting projected parts are formed between the organic light-emitting layer and the end of the transparent substrate.
- Each of the light-intercepting projected parts is formed to have a section of any one shape between a quadrangle and a triangle.
- The light-intercepting member is an ultraviolet absorbing layer that is formed on the packaging plate to be opposite the transparent substrate and absorbs the ultraviolet ray.
- The ultraviolet absorbing layer is formed at the edge of the packaging plate so as to be opposite between the end of the transparent substrate and the edge of the organic light-emitting layer, and in addition, to overlap the edge of the organic light-emitting layer.
- These and other objects of the invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings, in which:
- FIG. 1 is a sectional diagram representing a general electro luminescence display device;
- FIG. 2 is a sectional diagram representing a bonding process to bond a transparent substrate with a packaging plate, wherein the transparent substrate and the packaging plate are shown in FIG. 1;
- FIG. 3 is a sectional diagram of enlarged part A shown in FIG. 2;
- FIG. 4 is a view representing a brightness difference due to the deterioration of an organic light-emitting layer caused by an ultraviolet ray reflected by a packaging plate;
- FIG. 5 is a sectional diagram representing an electro luminescence display device according to a first embodiment of the present invention;
- FIG. 6 is a sectional diagram of enlarged part B shown in FIG. 5;
- FIG. 7 is a sectional diagram representing an electro luminescence display device according to a second embodiment of the present invention;
- FIG. 8 is a sectional diagram of enlarged part C shown in FIG. 7;
- FIG. 9 is a sectional diagram representing an electro luminescence display device according to a third embodiment of the present invention; and
- FIG. 10 is a sectional diagram of enlarged part D shown in FIG. 9.
- Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
- Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to FIGs. 5 to 10.
- Referring to FIG. 5, an electro luminescence display device according to a first embodiment of the present invention includes a
transparent substrate 102; an organic light-emitting layer 118 formed on thetransparent substrate 102; apackaging plate 124 to seal off the organic light-emittinglayer 118 on thetransparent substrate 102; asealant 122 to bond thepackaging plate 124 with thetransparent substrate 102; and at least one light-intercepting projected part formed at thepackaging plate 124 to prevent an ultraviolet ray illuminated onto thesealant 122 upon bonding thepackaging plate 124 with thetransparent substrate 102, from being illuminated onto the light-emittinglayer 118. - The organic light-
emitting layer 118 includes an electron inj ection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown). In the organic light-emitting layer 118, if voltage is applied between a transparent electrode as the anode and a metal electrode as the cathode, the electrons generated from the cathode move to the light-emitting layer through the electron inj ection layer and the electron transport layer, and the holes generated from the anode move to the light emitting layer through the hole inj ection layer and the hole transport layer. Accordingly, in the light-emitting layer, the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light. The light is emitted to the outside through the anode, the transparent electrode, to display a picture. - The
packaging plate 124 is bonded with thetransparent substrate 102 by thesealant 122 to cover the organic light-emittinglayer 118. Thepackaging plate 124 absorbs moisture and oxygen in the air, so ahygroscopic film 127 is stuck to thepackaging plate 124 in order to protect the organic light-emittinglayer 118 from the moisture and oxygen in the air. For this, thepackaging plate 124 includes a steppedpart 130 having anincline plane 126 and ahorizontal plane 128. The steppedpart 130 provides an inner space, where thehygroscopic film 127 is stuck, in the central part of thepackaging plate 124. - The
sealant 122 is spread between thetransparent substrate 102 and the most outer steppedplane 128 of thepackaging plate 124, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding thepackaging plate 124 with thetransparent substrate 102. Due to this, thepackaging plate 124 seals up the organic light-emittinglayer 118 by being bonded with thetransparent substrate 102 by thesealant 122 in a vacuum state. - The at least one light-intercepting projected
part 140 is projected toward thetransparent substrate 102 to have a section of any one shape of a quadrangle and a triangle on thepackaging plate 124 corresponding to and between thesealant 122 and the organic light-emittinglayer 118. At this moment, the light-intercepting projectedpart 140 is projected to be close to the organic light-emittinglayer 118 to the utmost, and in addition, to have a designated gap with thetransparent substrate 102. - The light-intercepting projected
part 140 shut off that the ultraviolet ray illuminated onto thesealant 122 upon the bonding process of thetransparent substrate 102 and thepackaging plate 124 is dispersed by theincline plane 126 of thepackaging plate 124 to deteriorate the organic light-emittinglayer 118 and is illuminated onto the driving devices of the surrounding area of the EL display device. - More specifically, the electro luminescence display device according to the first embodiment of the present invention illuminates the ultraviolet ray onto the
sealant 122 spread at the edge of any one of thepackaging plate 124, which protects the organic light-emittinglayer 118 from the oxygen and moisture in the air, and thetransparent substrate 102, where the organic light-emittinglayer 118 is formed, to harden thesealant 122, thereby bonding the transparent 102 with thepackaging plate 124. At this moment, the light-intercepting projectedpart 140, as shown in FIG. 6, when the borrowedlight 170 generated by having the ultraviolet ray, which is illuminated onto thesealant 122, dispersed by theincline plane 126 of thepackaging plate 124 is illuminated onto the organic light-emittinglayer 118 and the driving devices of the surrounding part of the EL display device, reflects the borrowed light 170 to thesealant 122 to shut it off. Accordingly, the electro luminescence display device according to the first embodiment of the present invention can prevent the deterioration of the organic light-emittinglayer 118 and the characteristic change of the driving devices of the surrounding part of the EL display device caused by the borrowedlight 170 that is generated by thepackaging plate 124 upon the hardening of thesealant 122. - Referring to FIG. 7, an electro luminescence display device according to a second embodiment of the present invention includes a
transparent substrate 202; an organic light-emittinglayer 218 formed on thetransparent substrate 202; apackaging plate 224 to seal off the organic light-emittinglayer 218 on thetransparent substrate 202; asealant 222 to bond thepackaging plate 224 with thetransparent substrate 202; and a plurality of light-intercepting projectedpart 240 projected toward thepackaging plate 224 from thetransparent substrate 202 to prevent a borrowed light caused by the dispersion of an ultraviolet ray illuminated onto thesealant 222 upon bonding thepackaging plate 224 with thetransparent substrate 202, from being illuminated onto the light-emittinglayer 218. - The organic light-emitting
layer 218 includes an electron injectionlayer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown). In the organic light-emittinglayer 218, if voltage is applied between a transparent electrode as the anode and a metal electrode as the cathode, the electrons generated from the cathode move to the light-emitting layer through the electron injection layer and the electron transport layer, and the holes generated from the anode move to the light emitting layer through the hole injection layer and the hole transport layer. Accordingly, in the light-emitting layer, the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light. The light is emitted to the outside through the anode, the transparent electrode, to display a picture. - The
packaging plate 224 is bonded with thetransparent substrate 202 by thesealant 222 to cover the organic light-emittinglayer 218. Thepackaging plate 224 absorbs moisture and oxygen in the air, so ahygroscopic film 227 is stuck to thepackaging plate 224 in order to protect the organic light-emittinglayer 218 from the moisture and oxygen in the air. For this, thepackaging plate 224 includes a steppedpart 230 having anincline plane 226 and ahorizontal plane 228. The steppedpart 230 provides an inner space, where thehygroscopic film 227 is stuck, in the central part of thepackaging plate 224. - The
sealant 222 is spread between thetransparent substrate 202 and the most outer steppedplane 228 of thepackaging plate 224, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding thepackaging plate 224 with thetransparent substrate 202. Hereby, thepackaging plate 224 seals up the organic light-emittinglayer 218 by being bonded with thetransparent substrate 202 by thesealant 222 in a vacuum state. - The light-intercepting projected
parts 240 are projected toward atransparent substrate 202 to have a section of any one shape of a quadrangle and a triangle at the edge of thetransparent substrate 202. In other words, the light-intercepting projectedpart 240 is formed between the organic light-emittinglayer 218 and the end of thetransparent substrate 202, and thesealant 222 is spread on part of the light-intercepting projectedpart 240. - The light-intercepting projected
parts 240 shut off that the ultraviolet ray illuminated onto thesealant 222 upon the bonding process of thetransparent substrate 202 and thepackaging plate 224 is dispersed by theincline plane 226 of thepackaging plate 224 to deteriorate the organic light-emittinglayer 218 and is illuminated onto the driving devices of the surrounding area of the EL display device. - More specifically, the electro luminescence display device according to the second embodiment of the present invention illuminates the ultraviolet ray onto the
sealant 222 spread at the edge of any one of thepackaging plate 224, which protects the organic light-emittinglayer 218 from the oxygen and moisture in the air, and thetransparent substrate 202, where the organic light-emittinglayer 218 is formed, to harden thesealant 222, thereby bonding the transparent 202 with thepackaging plate 224. At this moment, the light-intercepting projectedparts 240, as shown in FIG. 8, when the borrowedlight 270 generated by having the ultraviolet ray, which is illuminated onto thesealant 222, dispersed by theincline plane 226 of thepackaging plate 224 is illuminated onto the organic light-emittinglayer 218 and the driving devices of the surrounding part of the EL display device, reflects the borrowed light 270 to thesealant 222 to shut it off. For this, the light-intercepting projectedpart 240 is projected on thetransparent substrate 202 to be close to the packaging plate to the utmost in order to shut off that the borrowedlight 270 progresses to the organic light-emittinglayer 218 by thepackaging plate 224. - Accordingly, the electro luminescence display device according to the second embodiment of the present invention can prevent the deterioration of the organic light-emitting
layer 218 and the characteristic change of the driving devices of the surrounding part of the EL display device caused by the borrowedlight 270 that is generated by thepackaging plate 224 upon the hardening of thesealant 222. - Referring to FIG. 9, an electro luminescence display device according to a third embodiment of the present invention includes a
transparent substrate 302; an organic light-emittinglayer 318 formed on thetransparent substrate 302; apackaging plate 324 to seal off the organic light-emittinglayer 318 on thetransparent substrate 302; asealant 322 to bond thepackaging plate 324 with thetransparent substrate 302; and an ultravioletray absorbing layer 340 formed at thepackaging plate 324 to prevent an ultraviolet ray illuminated onto thesealant 322 upon bonding thepackaging plate 324 with thetransparent substrate 302, from being illuminated onto the light-emittinglayer 318. - The organic light-emitting
layer 318 includes an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer and a hole injection layer that are deposited between an anode and a cathode (not shown). In the organic light-emittinglayer 318, if voltage is applied between a transparent electrode as the anode and a metal electrode as the cathode, the electrons generated from the cathode move to the light-emitting layer through the electron inj ection layer and the electron transport layer, and the holes generated from the anode move to the light emitting layer through the hole injection layer and the hole transport layer. Accordingly, in the light-emitting layer, the electrons and the holes supplied from the electron transport layer and the hole transport layer collide with each other to be recombined, thereby generating light. The light is emitted to the outside through the anode, the transparent electrode, to display a picture. - The
packaging plate 324 is bonded with thetransparent substrate 302 by thesealant 322 to cover the organic light-emittinglayer 318. Thepackaging plate 324 absorbs moisture and oxygen in the air, so ahygroscopic film 327 is stuck to thepackaging plate 324 in order to protect the organic light-emittinglayer 318 from the moisture and oxygen in the air. For this, thepackaging plate 324 includes a steppedpart 330 having anincline plane 326 and ahorizontal plane 328. The steppedpart 330 provides an inner space, where thehygroscopic film 327 is stuck, in the central part of thepackaging plate 324. - The
sealant 322 is spread between thetransparent substrate 302 and the most outer steppedplane 328 of thepackaging plate 324, and then it is hardened by ultraviolet ray to be illuminated, thereby bonding thepackaging plate 324 with thetransparent substrate 302. Hereby, thepackaging plate 324 seals up the organic light-emittinglayer 318 by being bonded with thetransparent substrate 302 by thesealant 322 in a vacuum state. - The
ultraviolet absorbing layer 340 is formed at thehorizontal plane 328 ad theincline plane 326 of the edge of thepackaging plate 324 that are corresponding to the edge of thetransparent substrate 302. In other words, theultraviolet absorbing layer 340 is formed at the rear surface of thepackaging plate 324 to be opposite between the end of thetransparent substrate 302 and the end of the organic light-emittinglayer 318. At this moment, theultraviolet absorbing layer 340 is formed to overlap the edge area of the organic light-emittinglayer 318. - The
ultraviolet absorbing layer 340 shut off that the ultraviolet ray illuminated onto thesealant 322 upon the bonding process of thetransparent substrate 302 and thepackaging plate 324 is dispersed by theincline plane 326 of thepackaging plate 324 to deteriorate the organic light-emittinglayer 318 and is illuminated onto the driving devices of the surrounding area of the EL display device. - More specifically, the electro luminescence display device according to the third embodiment of the present invention illuminates the ultraviolet ray onto the
sealant 322 spread at the edge of any one of thepackaging plate 324, which protects the organic light-emittinglayer 318 from the oxygen and moisture in the air, and thetransparent substrate 302, where the organic light-emittinglayer 318 is formed, to harden thesealant 322, thereby bonding the transparent 302 with thepackaging plate 324. At this moment, theultraviolet absorbing layer 340, as shown in FIG. 10, when theultraviolet ray 362 is illuminated onto thesealant 322, absorbs theultraviolet ray 362 that is reflected toward the organic light-emittinglayer 318 by theincline plane 326 and thehorizontal plane 328 of thepackaging plate 324. In other words, theultraviolet absorbing layer 340 reduces the reflection efficiency of the illuminatedultraviolet ray 362 to shut off that the borrowedlight 370 generated by being dispersed by theincline plane 326 and thehorizontal plane 328 of thepackaging plate 324 is reflected toward the organic light-emittinglayer 318. Accordingly, the electro luminescence display device according to the third embodiment of the present invention can prevent the deterioration of the organic light-emittinglayer 318 and the characteristic change of the driving devices of the surrounding part of the EL display device caused by the borrowedlight 370 that is generated by thepackaging plate 324 upon the hardening of thesealant 322. - As described above, the electro luminescence display device according to the present invention includes the light-intercepting projected part which is projected toward the transparent substrate from the edge of the packaging plate. Accordingly, the present invention intercepts the ultraviolet ray which is illustrated onto the sealant upon bonding the transparent substrate with the packaging plate and reflected by the packaging plate to be illustrated onto the organic light-emitting layer, thereby preventing the deterioration of the organic light-emitting layer and the characteristic change of the driving devices of the surrounding part of the EL display device.
- Further, the electro luminescence display device according to another embodiment of the present invention includes a plurality of light-intercepting projected parts which are proj ected toward the packaging plate from the edge of the transparent substrate. Accordingly, the present invention shuts off the ultraviolet ray, which is illuminated onto the sealant upon bonding the transparent substrate with the packaging plate and reflected by the packaging plate to be illuminated onto the organic light-emitting layer, by use of the plurality of light-intercepting proj ected parts, thereby preventing the deterioration of the organic light-emitting layer and the characteristic change of the driving devices of the surrounding area of the EL display device.
- Further, the electro luminescence display device according to another embodiment of the present invention includes the ultraviolet absorbing layer that is formed at the edge of the packaging plate. Accordingly, the present invention absorbs the ultraviolet ray, which is illuminated onto the sealant upon bonding the transparent substrate with the packaging plate and reflected by the packaging plate to be illuminated onto the organic light-emitting layer, by use of the ultraviolet absorbing layer, thereby preventing the deterioration of the organic light-emitting layer and the characteristic change of the driving devices of the surrounding area of the EL display device.
- Although the present invention has been explained by the embodiments shown in the drawings described above, it should be understood to the ordinary skilled person in the art that the invention is not limited to the embodiments, but rather that various changes or modifications thereof are possible without departing from the spirit of the invention. Accordingly, the scope of the invention shall be determined only by the appended claims and their equivalents.
- The claims refer to examples of preferred embodiments of the invention. However, the invention also refers to the use of any single feature and subcombination of features which are disclosed in the claims, the description and/or the drawings.
Claims (10)
- An electro luminescence display device, comprising:a transparent substrate;an organic light-emitting layer formed on the transparent substrate;a packaging plate bonded with the transparent substrate by a sealant to cover the organic light-emitting layer; anda light-intercepting member to shut off that the ultraviolet ray illuminated onto the sealant upon bonding the transparent substrate with the packaging plate is reflected by the packaging plate to be illuminated onto the organic light-emitting layer.
- The electro luminescence display device according to claim 1, wherein the light-intercepting member is a light-intercepting projected part which is projected toward the transparent substrate from the packaging plate.
- The electro luminescence display device according to claim 2, wherein the light-intercepting projected part is located between the sealant and the organic light-emitting layer.
- The electro luminescence display device according to claim 2, wherein the light-intercepting projected part is projected from the packaging plate to be close to the organic light-emitting layer to the utmost.
- The electro luminescence display device according to claim 2, wherein the light-intercepting projected part is formed to have a section of any one shape between a quadrangle and a triangle.
- The electro luminescence display device according to claim 1, wherein the light-intercepting member is a plurality of light-intercepting projected parts that are projected toward the packaging plate from the transparent substrate.
- The electro luminescence display device according to claim 6, wherein the light-intercepting projected parts are formed between the organic light-emitting layer and the end of the transparent substrate.
- The electro luminescence display device according to claim 6, wherein each of the light-intercepting projected parts is formed to have a section of any one shape between a quadrangle and a triangle.
- The electro luminescence display device according to claim 1, wherein the light-intercepting member is an ultraviolet absorbing layer that is formed on the packaging plate to be opposite the transparent substrate and absorbs the ultraviolet ray.
- The electro luminescence display device according to claim 9, wherein the ultraviolet absorbing layer is formed at the edge of the packaging plate so as to be opposite between the end of the transparent substrate and the edge of the organic light-emitting layer, and in addition, to overlap the edge of the organic light-emitting layer.
Applications Claiming Priority (2)
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KR1020030073310A KR100551121B1 (en) | 2003-10-21 | 2003-10-21 | Electro luminescence display device |
KR2003073310 | 2003-10-21 |
Publications (2)
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EP1526589A2 true EP1526589A2 (en) | 2005-04-27 |
EP1526589A3 EP1526589A3 (en) | 2006-07-26 |
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EP04024957A Withdrawn EP1526589A3 (en) | 2003-10-21 | 2004-10-20 | Electro luminescence display device |
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US (1) | US7189990B2 (en) |
EP (1) | EP1526589A3 (en) |
KR (1) | KR100551121B1 (en) |
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US8405193B2 (en) * | 2004-04-02 | 2013-03-26 | General Electric Company | Organic electronic packages having hermetically sealed edges and methods of manufacturing such packages |
KR100892413B1 (en) * | 2007-10-12 | 2009-04-10 | 전자부품연구원 | Oled lighting apparatus |
KR101023129B1 (en) * | 2008-07-25 | 2011-03-18 | 삼성모바일디스플레이주식회사 | Organic light emitting diode display and method for manufacturing the smae |
KR101146985B1 (en) * | 2010-03-11 | 2012-05-23 | 삼성모바일디스플레이주식회사 | Display device and method of manufacturing the same |
TWI574442B (en) * | 2014-04-10 | 2017-03-11 | 友達光電股份有限公司 | Display panel |
KR102404720B1 (en) * | 2015-03-03 | 2022-06-02 | 삼성디스플레이 주식회사 | Display device |
CN105470410B (en) * | 2016-02-24 | 2018-05-29 | 上海天马有机发光显示技术有限公司 | A kind of display panel and its method for packing |
CN106935731B (en) | 2017-05-15 | 2020-03-06 | 京东方科技集团股份有限公司 | Organic electroluminescent display device and display apparatus |
KR102430794B1 (en) * | 2017-11-30 | 2022-08-08 | 엘지디스플레이 주식회사 | Display apparatus |
CN109950414A (en) * | 2019-01-31 | 2019-06-28 | 昆山国显光电有限公司 | A kind of display panel and display equipment |
CN110571347B (en) * | 2019-08-09 | 2021-04-02 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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Also Published As
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EP1526589A3 (en) | 2006-07-26 |
US7189990B2 (en) | 2007-03-13 |
KR100551121B1 (en) | 2006-02-13 |
KR20050038101A (en) | 2005-04-27 |
US20050116221A1 (en) | 2005-06-02 |
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